starter-kit-upgrade

name	starter-kit-upgrade
description	Selectively pull upstream improvements from a Laravel starter kit (laravel/vue-starter-kit, laravel/react-starter-kit, laravel/svelte-starter-kit, laravel/livewire-starter-kit) into a project bootstrapped from one. Use when the user wants to update, sync, or migrate features from their starter kit. Applies one feature at a time on a dedicated branch; never auto-merges customized files.

Laravel Starter Kit Upgrade

• Users bootstrap from laravel/vue-starter-kit, react-starter-kit, svelte-starter-kit, or livewire-starter-kit, then customize. They own the code.
• We pick specific features from upstream (e.g. "toast notifications", "2FA autofocus fix"), not "version upgrades."
• The user's git history is unrelated to the kit's. There is no common ancestor. We compare user-now vs upstream-now, byte by byte.
• We never auto-merge a customized file. Customizations are surfaced; the user decides.
• Behavior preservation is the contract: the user's currently-passing tests/typecheck/build must still pass after.

Safety contract: non-negotiable

Read these to the user before any side effects, and live by them throughout:

1. Working tree must be clean. If git status --porcelain is non-empty, refuse and tell the user to commit or stash. Do not "stash for them."
2. All work happens on a dedicated branch (starter-kit-upgrade/<short-id>). The user's current branch is never modified.
3. Each applied feature is its own commit. That is how revertability works.
4. Never auto-resolve conflicts. A change touching customized code is surfaced; default action is to skip the file.
5. Never silently overwrite manifests or lockfiles (composer.json, package.json, *-lock.*). Show diffs; let the user decide.
6. Verify behavior preservation. Re-run the user's tests/typecheck/build after applying. A previously-passing check that now fails is a regression. Stop, surface, recommend revert.
7. Detect from unambiguous signals; ask when ambiguous. Concrete evidence (e.g. config/fortify.php exists) is fine. Picking a likely answer when signals are mixed or absent is not.

If any of these is violated, abort with a clear message about what went wrong and how to recover.

Required tools

• git (in the user's project)
• gh (authenticated; gh auth status returns OK)
• jq (used by run_tests.sh)
• bash (for the bundled scripts)

If any is missing, stop in Phase 4 and tell the user how to install.

Gotchas

Environment-specific behavior the agent will get wrong without being told. Read these before starting the workflow and apply throughout.

• Parallel implementations. When a feature has new files plus differs to call sites, the user may already have an in-house equivalent (their own toast helper, validation rule, etc.). Surface as a whole; don't apply the new files in isolation as if they're "safe." Default action is to skip the entire feature; the user can opt to adopt upstream's version and remove theirs later.

• Renamed paths. If a new path's basename or class name already exists elsewhere in the user's repo, the user has likely renamed/moved it. Surface, don't auto-apply, or you'll create a duplicate. Show them the upstream change and let them apply it to their renamed file by hand or wait for user confirmation.

• Later upstream edits. Copying upstream HEAD pulls in every commit since the feature, not just the feature's own changes. Always run the Phase 5 step 2 check before applying. When later edits exist, scope to <sha>:<path> instead of HEAD:<path>.

• Transitive imports. New files often import from helpers that are NOT in the same feature commit (Vue/React/Svelte: @/lib/..., @/components/...; Livewire: @include, <x-...>, <livewire:...>). Phase 5 step 4 covers the scan; never declare a feature applied without it. Uncovered imports show up as runtime/compile errors.

• Lockfile drift. Manifests are user-curated. Never overwrite. Walk the user through the upstream diff, let them merge, then regenerate lockfiles via the package manager (Phase 6).

• Stale node_modules after major bumps. After Vite v7 → v8, React 18 → 19, etc., npm install often fails with ERESOLVE. Clean and reinstall (Phase 6).

• New migrations. When upstream adds migrations (e.g. "Catch migrations up to Skeleton"), surface them separately. Recommend php artisan migrate:status first; applying a new migration on a populated DB can fail loudly.

• Major framework bumps as features. Things like Laravel 12 → 13, Livewire 3 → 4, or Inertia v2 → v3 are too large and too breaking for the feature-by-feature flow. Do not attempt them through this skill. Instead, prompt the user to run the corresponding Laravel Boost MCP slash command first, then come back and re-run this skill against the resulting (clean-tree) repo. If Boost is not yet installed: composer require laravel/boost --dev && php artisan boost:install (requires Boost ^2.0). Slash commands:

  • Laravel 12 → 13: /upgrade-laravel-v13
  • Livewire 3 → 4: /upgrade-livewire-v4
  • Inertia v2 → v3: /upgrade-inertia-v3

• Already-present features. If Phase 2's pre-filter missed it and Phase 5's classifier reports every file as already-present, skip the feature with a note: "every file matches upstream's current; moving on." Don't commit an empty commit.

• More than ~50 differs. The per-file walkthrough is too tedious to be useful at that scale. Stop, recommend manual upgrade for that feature.

Workflow

Eight phases, in order. Each phase establishes invariants the next relies on.

Phase 1: Identify the kit and branch variant

Inspect the user's project:

	vue	react	svelte	livewire
Cue	.vue files in resources/js/components/ui/	.tsx files in resources/js/components/ui/	.svelte files in resources/js/components/ui/	no resources/js/components/ui/ dir
package.json has	"vue" + "@inertiajs/vue3"	"react" + "@inertiajs/react"	"svelte" + "@inertiajs/svelte"	n/a
composer.json has	n/a	n/a	n/a	"livewire/livewire" + "livewire/flux"

State the detected kit out loud. If only one column matches, proceed. If two columns partially match (e.g. both .vue and .tsx present, or package.json lists vue and react), stop and ask.

Then determine the branch variant. There are four branches per kit, formed by two independent axes:

• Auth axis (read composer.json):
  • Fortify if composer.json has laravel/fortify, or config/fortify.php exists, or app/Actions/Fortify/ exists, or app/Providers/FortifyServiceProvider.php exists.
  • WorkOS if composer.json has laravel/workos and none of the Fortify markers are present.
• Teams axis (check whether team scaffolding is present):
  • Teams if app/Models/Team.php exists (usually accompanied by Membership.php, TeamInvitation.php, and a ..._create_teams_table.php migration).
  • Non-teams otherwise.

Combine the two axes to get the branch name:

Auth	Teams	Branch
Fortify	no	main
Fortify	yes	teams
WorkOS	no	workos
WorkOS	yes	workos-teams

State the detected branch out loud. Only ask if signals are contradictory (e.g. Fortify markers present and laravel/workos in composer, or a Team.php model with no teams migration); that means user customization you can't safely guess at.

Phase 2: Enumerate available upstream features

The user can't tell you "what version they're on" reliably (and we don't try). Inspect upstream as it exists today and present a feature catalog.

Fetch raw data. The default window is the last 100 commits / merged PRs; tell the user that up front so they know features older than that won't appear in the catalog. If they bootstrapped well before that window, walk back with &page=2, &page=3, etc. or raise --limit.

gh api "repos/laravel/<kit>/commits?sha=<branch>&per_page=100" \
  -q '.[] | {sha: .sha[0:7], date: .commit.author.date[0:10], msg: .commit.message | split("\n")[0]}'

gh pr list --repo "laravel/<kit>" --state merged --base "<branch>" --limit 100 \
  --json number,title,mergeCommit,mergedAt

Cluster commits/PRs into user-facing features. Examples a user would recognize:

• "Toast notifications across all kits" (1 commit, several files)
• "Password visibility toggle in auth forms" (1 commit, 3 files)
• "2FA autofocus fix" (1 commit, 1 file)
• "Teams support" (1 PR, many files; flag as large)
• "Inertia 3 upgrade" (lockfile-heavy; flag as needing review)
• "Maintenance: formatting / lint config" (bucket of small commits)

Bucket internal/refactor commits as a single "Maintenance" entry. The user usually skips it.

Pre-filter: for each candidate feature, run scripts/classify_feature.sh against its commit. If every file is already-present, mark [!] Already present and skip by default.

Phase 3: Present the catalog and get explicit selection

Available upstream features (vue-starter-kit, branch: main):

[ ] Toast notifications              · PR #142, 4 files, 1 lockfile
[ ] Password visibility toggle       · PR #131, 3 files
[ ] 2FA autofocus fix                · commit 78fda0c, 1 file
[ ] Teams support                    · PR #98, 23 files (LARGE)
[~] Inertia 3 upgrade                · PR #110, lockfile-heavy (review carefully)
[!] Already present: Vite font plugin

Which would you like to pull in?

Wait for the selection. Recap the picks and the affected file counts. Ask one final time before any side effects.

Phase 4: Preflight, baseline, and workspace setup

Run preflight:

scripts/preflight.sh <user_repo>

It checks the repo is a git repo, the tree is clean, and that gh (authenticated) and jq are available. If it exits non-zero, surface the message verbatim and stop.

Record a verification baseline so Phase 7 can distinguish regressions from pre-existing failures. Use mktemp so concurrent runs don't clobber each other:

baseline=$(mktemp -t skup-baseline.XXXXXX.json)
scripts/run_tests.sh <user_repo> --baseline "$baseline"

Hold onto $baseline; Phase 7 needs it.

Fetch the upstream kit and capture its path:

kit_dir=$(scripts/fetch_kit.sh <kit> <branch>)

Hold onto $kit_dir; Phase 5 needs it. The script is idempotent: re-running with the same args fetches the latest branch tip rather than re-cloning.

Create the upgrade branch:

git -C <user_repo> checkout -b "starter-kit-upgrade/$(date +%Y%m%d-%H%M)-<first-slug>"

If the user is already on a starter-kit-upgrade/... branch (a previous run that didn't get cleaned up), checkout -b will refuse if the new name collides. Don't auto-resolve: ask whether they want to resume on that branch (skip the checkout -b, keep going from where they were), start fresh (the new timestamped name will already differ by minute, so just retry — or bump to +%Y%m%d-%H%M%S if it's the same minute), or abort so they can clean up manually. Never delete the existing branch on their behalf.

From this point on, every write goes to this branch.

Phase 5: Apply each selected feature

For each selected feature, in order:

1. Classify. Run scripts/classify_feature.sh <kit_dir> <sha> <user_repo>. Statuses:

• new: file does not exist in user repo, exists at upstream HEAD. Safe to add.
• already-present: user's file is byte-identical to upstream HEAD. Skip.
• differs: user has the file and bytes differ from upstream HEAD. Surface.
• deleted-upstream: upstream HEAD lacks the file but the user has it. Surface; default is keep theirs.
• lockfile: manifest or lock file. Surface; never auto-merge.

The classifier compares only against upstream HEAD. The user's git history doesn't trace back to the kit's, so there's no "before-image" baseline to merge against; we don't try. The feature commit just enumerates which paths to look at.

2. Later-edits check. Find which feature paths later upstream commits also modified:

scripts/later_edits.sh <kit_dir> <sha> <user_repo>

Each path the script prints is a path where copying upstream HEAD's content pulls later changes in too. Diff <sha>:<path> against HEAD:<path>; if a non-whitespace hunk differs, scope to the feature commit (git -C <kit_dir> show <sha>:<path>) and note it in the report.

3. Apply new files. The script writes upstream HEAD's content for each new path and stages it; everything else is left for steps 4–5:

scripts/apply_new_files.sh <kit_dir> <sha> <user_repo>

It prints applied <path> for each file written so you can collect the list for the feature's commit message and the report.

Before letting the script run, check for the rename gotcha (see Gotchas → "Renamed paths"). If a new path's basename already exists at a different location in the user's repo, surface to the user before applying.

4. Transitive-imports check. New files often import helpers that aren't in the same feature commit. The script picks the right regex for the kit (Vue/React/Svelte handle TS/JS imports; Livewire handles Blade includes / x- components / livewire: tags):

scripts/scan_transitive_imports.sh <kit> <new_files...>

Output is <file>:<line>:<match> per import. For each match, verify the corresponding helper file exists in the user's repo. If not, the new files won't compile/render; flag the missing target as a follow-up dependency the user needs to fetch (same walkthrough as differs).

5. Walk the user through differs, deleted-upstream, and lockfile. One file at a time:

• Show what upstream has: git -C <kit_dir> show HEAD:<path> (or <sha>:<path> if later_edits.sh flagged this path).
• Show their current file.
• Show the diff between the two.
• Ask the user to pick: take upstream wholesale (lossy; confirm first), keep theirs, or merge by hand (you produce a unified diff for reference; they write the result).
• If they're unsure, ask once more with the diff in front of them. Still unsure → keep theirs and move on. Don't pick silently.
• Stage whatever they chose: git -C <user_repo> add <path>.

For lockfile: never overwrite the manifest. Show the upstream diff for composer.json / package.json, walk them through the relevant change, let them edit the manifest. Lockfile regeneration happens in Phase 6.

6. Commit the feature as one revertable unit:

git -C <user_repo> commit -m "starter-kit-upgrade: <feature name>

Upstream: laravel/<kit>@<sha>
Files added: <list>
Files updated (took upstream): <list>
Files updated (manual merge): <list>
Files kept as-is: <list>"

If the user wants to bail out at any point, leave the branch as-is. They can drop it with git branch -D.

Phase 6: Reconcile manifests if needed

If any feature touched a manifest, lockfiles are out of sync. After the user agrees, run:

scripts/reconcile_manifests.sh <user_repo>

The script runs composer install (when composer.json + composer.lock are both present), auto-detects the JS package manager from the existing lockfile, runs <pm> install, and on failure (typically ERESOLVE after a major bump like Vite v7 → v8 or React 18 → 19) wipes node_modules + the lockfile and retries once.

Commit lockfile updates as a separate starter-kit-upgrade: dependency lockfiles commit so they can be reverted independently.

Phase 7: Verify behavior preservation

Compare against the baseline:

scripts/run_tests.sh <user_repo> --compare "$baseline"

Compare mode runs PHP tests, JS typecheck, JS build (whichever exist) and reports only checks that were passing in the baseline and now fail. Pre-existing failures are not the upgrade's fault and don't block.

If a regression is reported:

• Show the failing output from the per-check log file the script points to.
• Recommend git revert HEAD first; if that doesn't fix it, revert again.
• For multi-feature uncertainty, suggest git bisect start <upgrade-branch> <previous-branch>.
• Do not edit code to make the failing check pass; that violates the behavior contract.

If the project has no discoverable verification commands, say so explicitly in the report. Don't pretend verification happened.

Phase 8: Write the report

Write to /tmp/starter-kit-upgrade-report-<id>.md (where <id> matches the upgrade branch's starter-kit-upgrade/<id>) first; never silently into the user's repo. Stamping the id keeps concurrent runs and re-runs from clobbering each other. Show the path and ask whether they want it copied in as STARTER_KIT_UPGRADE.md or kept out of tree.

# Starter Kit Upgrade Report

- Date: <date>
- Kit: laravel/<kit>
- Branch tracked: <branch>
- Upgrade branch: starter-kit-upgrade/<id>

## Features applied

- <feature name> · laravel/<kit>@<sha> · <N files>
  - Applied: <list>
  - Skipped: <list with reasons>
  - Manual decisions: <if any, with reasoning>
  - Later-edit drift avoided: <if any, with paths scoped manually>

## Lockfile updates

<which lock files were regenerated and how>

## Verification

- Baseline: <path or summary>
- Result: <PASS / REGRESSED:<list> / NO-CHECKS>
- Output: <relevant snippet>

## How to revert

- Drop a single feature: `git revert <commit-sha>`
- Discard everything: `git checkout <previous-branch> && git branch -D starter-kit-upgrade/<id>`

Out of scope

• Detecting which kit "version" the user started from. There is no reliable way; we don't pretend.
• Reconciling dep version constraints automatically. We show; the user decides.
• Forks of the starter kits. If the repo's structure isn't recognizable as one of the three official kits, refuse and explain.
• Cross-kit migration (e.g. Vue → React).
• Running linters / formatters on applied files. The user runs their own tooling.